US4414633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data processing and recording apparatus
Assignee: British Gas Corp
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Filing: 1981-02-24
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Granted: 1983-11-08
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Expires: 2001-02-24
Abstract
Abstract A low-cost data logging device, particularly suitable for recording gas meter performance having an electrical transducer to produce an electrical analogue of a parameter to be recorded, a calculator circuit to perform an analysis of measurements of the parameter and a plurality of memories to store the results of the analyses.
Inventors
- 👤 David A. Churchill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:21
CPC Classifications
G; G01; G01F; G01F15/00; G01F15/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
79 words
A gas flow rate recording apparatus comprising: transducer means located in a gas supply line which provides an electrical signal having a pulse frequency representative of the magnitude of the parameter being measured, said parameter falling into one or a range of predetermined upper and lower limits and a plurality of data storage memories, each corresponding to one specific range of said parameter limits to record the incidence of a measurement of said parameter within the respective predetermined ranges.
Claim 2
Dependent Claim
79 words
A gas flow rate recording apparatus comprising: transducer means located in a gas supply line which provides an electrical signal having a pulse frequency representative of the magnitude of the parameter being measured, said parameter falling into one or a range of predetermined upper and lower limits and a plurality of data storage memories, each corresponding to one specific range of said parameter limits to record the incidence of a measurement of said parameter within the respective predetermined ranges.
Claim 3
Dependent Claim
23 words
A gas flow rate recording apparatus as claimed in claim 1 further including timing means to permit the periodic recording of said parameter.
Claim 4
Dependent Claim
26 words
A gas flow rate recording apparatus as claimed in claim 1 further including printing means to produce a permanent record of the measurement of said parameter.
References Cited (Backward Citations)
US3855456A
Cited
US4184205A
Cited
US4155252A
Cited
US4253151A
Cited
US4291376A
Cited
US4334275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |